http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47558
--- Comment #15 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-02-01 15:11:51 UTC --- DYLD_LIBRARY_PATH is unset when xplor is started. Also remember that your test case in comment 9 is insufficient to reproduce the behavior of xplor-nih. The code calling the unwinder should be placed in a shared library and then called from a main program. I don't see anything in the following linkages which should cause a problem. gcc -fdefault-integer-8 -dynamiclib -o libfft.dylib dsint.o dsinti.o dcfftf.o dcfftb.o dcffti.o drffti.o drfftf.o drfftb.o zffti.o zfftf.o zfftb.o ctrans.o zfft1d.o zfft2d.o zfft3d.o ftrans.o zmp_fft.o zscal_fft.o zprod_fft.o fft_ftn.o -flat_namespace -undefined suppress -single_module -lcrypto -lblas gcc -fdefault-integer-8 -dynamiclib -o libpppack.dylib cubspl.o ppvalu.o intdy.o xerrwv.o -flat_namespace -undefined suppress -single_module -lcrypto gcc -fdefault-integer-8 -dynamiclib -o libspecfun.dylib gamma.o rjbesl.o ribesl.o -flat_namespace -undefined suppress -single_module -lcrypto g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module dpApi.o vmd.o vmdInter.o tclStream.o dpStream.o ssStream.o publicVMDInter.o thread.o -o libvmd.dylib -lcrypto g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module dinternal.o dint-atom.o dint-node.o dint-loop.o dint-step.o dint-powell.o dint-conmin.o dint-simplex.o dint-pc6.o dint-xplor.o publicIVM.o -o libintVar.dylib -lcrypto -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -llapack -lblas g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module maketables.o get.o study.o pcre.o -o libpcre.dylib -lcrypto g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module simulation.o xplorSimulation.o xplorWrap.o atom.o atomSel.o atomSelAction.o derivList.o pdbTool.o ensembleSimulation.o simulationWorld.o xplorPot.o mmapAlloc.o semaphore.o mutex-sem.o randomNum.o potList.o avePot.o modified.o enumNameMap.o dihedral.o ensemblePot.o xplorWrapProc.o coordComparer.o atomSelLang.o atomSelLangYacc.o mmapMalloc.o -o libcommon.dylib -lcrypto -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -lpcre -llapack -lblas g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module surf.o io.o compute.o dual.o utils.o lp.o chull.o tessel_cases.o tessel_patches.o tessel_convex.o tessel_concave.o tessel_torus.o surfDiff.o -o libsurfD.dylib -lcrypto -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -lspecfun -llapack -lblas g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module noePot.o atomProb.o rdcPot1.o csaPot.o jCoupPot.o shapePot.o atomDensity.o probDistPot.o cosRatioPot.o ncsPot.o prePot.o rdcWavePot.o varTensor.o surfaceArea.o psolPot.o orderPot.o posRMSDPot.o utils.o posSymmPot.o sphereFun.o volume.o planeDistPot.o selNBPot.o gyrPot.o cstMagPot.o diffPot.o relaxRatioPot.o distSymmPot.o sardcPot.o surfTessellation.o torsionDBPot.o nbTargetPot.o solnScatPot.o -o libnmrPot.dylib -lcrypto -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -lspecfun -lsurfD -llapack -lblas g++ -dynamiclib -fdefault-integer-8 -flat_namespace -undefined suppress -single_module PeakAssignment.o Peak.o MarvinNOEPotential.o ShiftAssignment.o EquivPeakAssignmentSet.o -o libmarvin.dylib -lcrypto gcc -fdefault-integer-8 -dynamiclib -o libxplor.dylib xfft.o xdofft.o dtorsion.o rotman.o array.o genic.o prot.o tsearch.o xmwrite.o carb.o csa.o geomty.o psfio.o update.o xparse.o hbonds.o usersb.o xpeakpik.o corman.o hbuild.o rotate.o util.o coup.o initia.o rotlsq.o vcorr.o xpred.o cstack.o intcor.o vcorrfft.o xprobab.o cstran.o matrix.o rsearch.o vector.o xprox.o distan.o mmdisg.o rtfio.o xasymm.o xreduce.o drigid.o modes.o rxconv.o xdeclare.o xrefin.o mrigid.o rxprin.o xdo.o xrmani.o dynamc.o nbonds.o rxrefi.o xropti.o dynanl.o ncs.o rxsetu.o xdofried.o xscale.o noe.o sbound.o xdohelp.o xsfsele.o dynlng.o onebond.o segmnt.o xfalgebra.o xshow.o eangle.o packing.o selrpn.o xsigmaa.o ebond.o parmio.o parser.o xmalgebra.o xskel.o enbond.o shake.o xmask.o xstats.o energy.o pick.o sort.o xmaverage.o xsymm.o etor.o plane.o string.o xmphisto.o xtarget.o expression.o powell.o surfac.o xmpsele.o fastnb.o power.o test.o xmread.o collapse_rgyr.o xrama.o trio_faster_newderiv.o susc_anis.o rama_gaussians.o orientations.o xdipolar_coup.o diff_anis.o anisotropy.o angledb.o vectangl.o fantacross.o fantalin.o xangle.o xccr.o xfantaccr.o xfantadipo.o xdipo_pcs.o xdipo_rdc.o xt1dist.o hbdb.o saxs.o pcsa.o ss_orient.o xadc.o hb_dist_angle.o aria.o ariman.o ariass.o aribac.o arical.o arivio.o bonded.o ace.o pmag.o tens_dip_e2.o tenso.o slink.o fxrefin.o fxparse.o fwrite.o pxrefin.o pxtarget.o fxmap.o pxparse.o pxmani.o xmap.o zpacking.o ppacking.o fenergy.o sebond.o seangl.o setor.o darwin64time.o osx_x86_64.o -flat_namespace -undefined suppress -single_module -lcrypto -L/Users/howarth/dist/lib -lgfortran -llapack -lblas -lblas -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ gcc -fdefault-integer-8 -dynamiclib -o libxplorCmd.dylib coorio.o dynio.o xplorFunc.o ps300.o python_stubs.o tcl_stubs.o ccalls.o cnshelp.o i1mach.o -flat_namespace -undefined suppress -single_module -lcrypto -L/Users/howarth/dist/lib -lgfortran -llapack -lblas -lblas -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -L/Users/howarth/dist/lib -lgfortran -llapack -lblas -lblas -lcrypto -L/Users/howarth/dist/lib -lgfortran -llapack -lblas -lblas -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ gcc -o xplor xplor.o \ \ -L. -lxplorCmd -lxplor -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ -lfft -lintVar -lvmd -lnmrPot -lcommon -lmarvin \ -lcrypto -L/Users/howarth/dist/lib -lgfortran -llapack -lblas -lblas -L/Users/howarth/xplor-nih-2.27/bin.Darwin_10_x86_64/ \ As for DYLD_LIBRARY_PATH, changing... +++ xplor 2011-02-01 10:04:59.000000000 -0500 @@ -89,6 +89,8 @@ if [ `uname` = "Darwin" ]; then LD_LIBPATH_VAR=DYLD_LIBRARY_PATH + echo "DYLD_LIBRARY_PATH = ",$DYLD_LIBRARY_PATH + echo "PATH = ",$PATH fi if [ "$LD_LIBRARYN32_PATH" != "" -a `uname` = "IRIX64" ]; then shows... DYLD_LIBRARY_PATH = , PATH = ,/usr/bin:/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/X11/bin Perhaps r163267 is fragile to certain combination of linker flags (like -flat_namespace)?